【摘要】：混凝土在目前工程建設(shè)中普遍應(yīng)用,但是由于混凝土本身的材料為非均質(zhì)且性質(zhì)較脆,硬化成型后的混凝土存在許多微孔隙,導(dǎo)致其在使用過(guò)程中易出現(xiàn)滲水和裂縫等現(xiàn)象,在不同程度上影響了混凝土的耐久性和力學(xué)性能�，F(xiàn)階段許多高層建筑外墻及地下工程出現(xiàn)了滲漏的難題,混凝土具有良好的抗?jié)B性能可以保證混凝土建筑物的安全性、節(jié)約混凝土建筑物的維護(hù)及修復(fù)成本、延長(zhǎng)混凝土建筑物的使用壽命及改善我們的生活及居住環(huán)境條件。抗?jié)B難題也一直受到學(xué)術(shù)界及工程界的高度重視,但取得的效果甚微。另外隨著建筑結(jié)構(gòu)的使用年限增加,我國(guó)面臨著較多老舊建筑加固修復(fù)的問(wèn)題。對(duì)結(jié)構(gòu)進(jìn)行加固,不但可以維持結(jié)構(gòu)正常使用功能,延長(zhǎng)結(jié)構(gòu)的使用壽命,而且也可為國(guó)家節(jié)約資金�；炷两Y(jié)構(gòu)的加固方法有很多,常用的有外包剛加固法、加大截面加固法、預(yù)應(yīng)力加固法、粘貼鋼板加固法及增設(shè)支點(diǎn)加固法,但是這些加固方法都有一些明顯的不足�，F(xiàn)在的加固材料多為有機(jī)材料,有機(jī)材料耐火性能及抗老化性能較差,且不利于環(huán)保,而抗?jié)B性能優(yōu)異的無(wú)機(jī)材料不但可以解決以上有機(jī)材料存在的材料弊端,而且與混凝土材料非常接近,不會(huì)形成材質(zhì)彼此不相容的隔離層,在加固后無(wú)機(jī)材料與原構(gòu)件之間有更好的相容性及工作協(xié)調(diào)性。采用無(wú)機(jī)材料加固能夠較好的解決加固工程中的耐久性問(wèn)題。本文首先分析影響混凝土抗?jié)B性能的主要因素,了解混凝土滲透的機(jī)理,為后續(xù)試驗(yàn)研究找到可行的解決問(wèn)題的突破口,并利用抗?jié)B儀采用水壓力法中的抗?jié)B標(biāo)號(hào)法進(jìn)行試驗(yàn)研究。了解傳統(tǒng)提高混凝土抗?jié)B性能的方法,與傳統(tǒng)提高混凝土抗?jié)B方法比較,說(shuō)明本研究的優(yōu)勢(shì)之處。并簡(jiǎn)要介紹高性能復(fù)合砂漿鋼筋網(wǎng)薄層對(duì)同時(shí)具有抗?jié)B及加固需求的工程意義之處。試驗(yàn)分別對(duì)素混凝土試塊、未摻加添加劑的水泥砂漿涂抹在混凝土迎水面的試塊及摻加新型添加劑的復(fù)合砂漿涂抹在混凝土迎水面的試塊進(jìn)行抗?jié)B試驗(yàn),并改變砂漿的涂抹厚度及添加劑的摻入量,分析試驗(yàn)所得數(shù)據(jù)。研究結(jié)果表明:摻加特殊新型添加劑的高性能復(fù)合砂漿涂抹在混凝土表面可有效提高混凝土的抗?jié)B性能。且此高性能復(fù)合砂漿與鋼筋網(wǎng)形成加固薄層能有效的對(duì)結(jié)構(gòu)進(jìn)行加固,對(duì)混凝土抗?jié)B性能及結(jié)構(gòu)加固方法的研究具有重要意義。
[Abstract]:Concrete is widely used in engineering construction at present. However, because the material of concrete itself is heterogeneous and brittle, there are many micro-pores in the concrete after hardening and forming, which leads to water seepage and cracks in the process of use. The durability and mechanical properties of concrete are affected to some extent. At the present stage, many high-rise building exterior walls and underground projects have the problem of leakage. The good impermeability of concrete can ensure the safety of concrete buildings and save the maintenance and repair cost of concrete buildings. Extend the service life of concrete buildings and improve our living and living environment. The problem of impermeability has always been attached great importance by the academic and engineering circles, but the effect has been very little. In addition, with the increase of the service life of the building structure, our country is faced with many problems of strengthening and repairing old and old buildings. Strengthening the structure can not only maintain the normal function of the structure and prolong the service life of the structure, but also save money for the country. There are many reinforcement methods for concrete structures, such as the external reinforcement method, the reinforcement method of increasing section, the method of prestress strengthening, the method of sticking steel plate and the method of adding the support point, but these methods have some obvious shortcomings. At present, most of the reinforcement materials are organic materials. The refractory and anti-aging properties of organic materials are poor, and they are not conducive to environmental protection. The inorganic materials with excellent impermeability can not only solve the disadvantages of the above organic materials, Moreover, it is very close to the concrete material, and will not form a mutually incompatible isolation layer, which has better compatibility and work coordination between the inorganic materials and the original members after strengthening. Using inorganic material to reinforce can solve the durability problem in reinforcement engineering. In this paper, the main factors affecting the impermeability of concrete are analyzed, and the mechanism of concrete permeation is understood. The anti-seepage mark method of water pressure method was used to test the anti-seepage meter. To understand the traditional methods to improve the impermeability of concrete, compare with the traditional methods of improving the impermeability of concrete, and explain the advantages of this study. This paper also briefly introduces the engineering significance of high performance composite mortar steel mesh thin layer for both impermeability and reinforcement. The impermeability tests were carried out on the plain concrete test blocks, the cement mortar without additives applied on the concrete water surface and the composite mortar smeared with new additives on the concrete water surface, respectively. The thickness of mortar smear and the amount of additives are changed, and the experimental data are analyzed. The results show that the high performance composite mortar smeared on the surface of concrete with special new additives can effectively improve the impermeability of concrete. The high performance composite mortar and reinforcement mesh can effectively strengthen the structure, which is of great significance to the study of the impermeability of concrete and the method of strengthening the structure.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TU746.3;TU578.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張小冬;黃瑩;趙霄龍;冷發(fā)光;;混凝土結(jié)構(gòu)加固與防護(hù)材料現(xiàn)狀和展望[J];建筑科學(xué);2013年11期

2 胡駿;江映;陳金友;郭淼江;;地下工程防水抗?jié)B要求與混凝土抗?jié)B問(wèn)題研究與探討[J];中國(guó)建筑防水;2012年16期

3 張小冬;黃瑩;;國(guó)內(nèi)既有建筑改造結(jié)構(gòu)與功能材料的應(yīng)用及發(fā)展[J];施工技術(shù);2010年11期

4 向陽(yáng)開(kāi);藍(lán)祥雨;;隧道聚丙烯纖維混凝土抗?jié)B性能分析及試驗(yàn)比較[J];土木建筑與環(huán)境工程;2010年05期

5 葛兆慶;周岳年;袁紅波;賀慧良;朱偉協(xié);;早期養(yǎng)護(hù)對(duì)混凝土結(jié)構(gòu)抗?jié)B性能的影響分析[J];施工技術(shù);2010年04期

6 張李黎;柳炳康;胡波;;再生混凝土抗?jié)B性試驗(yàn)研究[J];合肥工業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年04期

7 趙帥;李國(guó)忠;曹楊;田穎;;聚丙烯纖維和聚合物乳液對(duì)水泥砂漿性能的影響[J];建筑材料學(xué)報(bào);2007年06期

8 楊雷;馬保國(guó);管學(xué)茂;;超細(xì)礦粉對(duì)高強(qiáng)混凝土抗?jié)B性能的影響[J];商品混凝土;2007年02期

9 陳月順;劉莉;吳宏偉;;粉煤灰摻量對(duì)混凝土抗?jié)B性影響的研究[J];新型建筑材料;2007年03期

10 尚守平;聶旭;顏軍;;鋼筋網(wǎng)水泥復(fù)合砂漿薄層的耐火性能試驗(yàn)研究[J];建筑技術(shù)開(kāi)發(fā);2007年02期

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